v3.10.0.1
Net Income (Loss) per Share Attributable to Common Stockholders - Net Income (Loss) Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Sep. 29, 2018
Sep. 30, 2017
Numerator:        
Net (loss) income attributable to common stockholders, basic $ 979 $ (418) $ 1,996 $ 704
Net (loss) income attributable to common stockholders, diluted 979 (418) 1,996 704
Plus: undistributed earnings allocated to participating securities 873 0 2,384 2,055
Less: undistributed earnings reallocated to participating securities (863) 0 (2,362) (2,047)
Net income (loss) attributable to common stockholders $ 989 $ (418) $ 2,018 $ 712
Denominator:        
Weighted average number of shares outstanding, basic 31,356 29,825 30,980 29,510
Dilutive impact from:        
Weighted average number of shares outstanding, diluted 33,880 32,521 33,633 32,085
Net income (loss) per share attributable to common stockholders, basic (in dollars per share) $ 0.03 $ (0.01) $ 0.06 $ 0.02
Net income (loss) per share attributable to common stockholders, diluted (in dollars per share) $ 0.03 $ (0.01) $ 0.06 $ 0.02
Employee Stock Option        
Dilutive impact from:        
Share-based payment arrangements 1,899 1,962 1,944 1,869
Restricted stock units        
Dilutive impact from:        
Share-based payment arrangements 625 734 709 706